python工具——Scalene

Scalene 是一个 Python 的高性能 CPU内存分析器

用于Python脚本的CPU和内存分析器，能够正确处理多线程代码，还能区分Python代码和本机代码的运行时间

在linux或Mac OS X上运行

特点：

　　快速、开销少、精确

　　还能对高耗能的代码行进行标注

安装

pip install scalene

eg:

　　test.py

import time
def test():
    i=3;
    while i>0:
        print("test")
        time.sleep(10)
        i=i-1
test()

会生成一个文本形式的报告，显示出每一行代码的CPU和内存的使用情况

 

查看全部配置

python -m scalene --help

usage: scalene [-h] [--outfile OUTFILE] [--html] [--reduced-profile]
[--profile-interval PROFILE_INTERVAL] [--cpu-only]
[--profile-all] [--use-virtual-time]
[--cpu-percent-threshold CPU_PERCENT_THRESHOLD]
[--cpu-sampling-rate CPU_SAMPLING_RATE]
[--malloc-threshold MALLOC_THRESHOLD]

Scalene: a high-precision CPU and memory profiler.
https://github.com/emeryberger/scalene
% scalene yourprogram.py

optional arguments:
-h, --help show this help message and exit
--outfile OUTFILE file to hold profiler output (default: stdout)
--html output as HTML (default: text)
--reduced-profile generate a reduced profile, with non-zero lines only (default: False).
--profile-interval PROFILE_INTERVAL
output profiles every so many seconds.
--cpu-only only profile CPU time (default: profile CPU, memory, and copying)
--profile-all profile all executed code, not just the target program (default: only the target program)
--use-virtual-time measure only CPU time, not time spent in I/O or blocking (default: False)
--cpu-percent-threshold CPU_PERCENT_THRESHOLD
only report profiles with at least this percent of CPU time (default: 1%)
--cpu-sampling-rate CPU_SAMPLING_RATE
CPU sampling rate (default: every 0.01s)
--malloc-threshold MALLOC_THRESHOLD
only report profiles with at least this many allocations (default: 100)